Charge-forming device for explosive-engines.



F. P. HOOPER. CHARGE FORMWG DEVQCE FOR EXPLOSWE ENGINES. APPLIEATION FILED szPT. I4. 1912.

1 ,272.264:. Patented July 9, 1918.

2 SHEETS-SHEET l.

P. HUOPER.

DER/513E FOR ExPwswE ENQINES.

CHARGE FUHMSNG Patented July 9, 1915.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

.IRANKLIN 1. HQOPEZR, OF RAPID CITY,

soU'rH DAK OTA.

CHARGE-FORMIN G DEVICE FOR EXPLOSIVE-ENGINES.

i ines, and that Ido hereby declare the folowing to be a full. 'eleanand exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

i This invention relates to improvements in explosive engines. aiid has for its object to provide a device for admitting heated air to the air inlet port oftlie'carbure ter and inlet manifold to improve the duality of the combustiblemixture, and conse uen tly the speed and power'of the engine an to economize in the consumption of fuel.

Another-"object is the provision of a device of this character capable of introducing heated air With the incoming fuel at a point intermediate the carbureter and engine.

Another object is the provision of means located convenientlv near the driver of the vehicle for controlling the admission of heated air to the inlet manifold.

A still further object is the provision of an air heating device for explosive engines in which the heat of the exhaust pipe of the engine is utilized for heating the air. and into which a small portion of the products of combustion is admitted.

With these and other objects in view, the invention consists in the novel construction, combination and arrangement of parts as will be hereinafter specifically described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 represents a side elevation of the invention applied to use.

Fig. 2 represents a vertical sectional view on the line 2-2 of Fig. 1,

Fig. 3 represents a vertical sectional view through the air chamber carried by the exhaust pipe,

Fig. 4 represents a longitudinal view on the line 4 4 of Fig. 3, Fig. 5 represents a detail sectional view on the line 5-.5 of Fig, 3. V Fig. 6 represents a' enlarged sectional view on the line 6-6q f Fig- 1,

Fi 7 represents an enlarged detail sectiona view of the valve controlling. the adsectional Specification of Letters Patent.

in the county of Pennington,

PatentedJuly 9 1918.

A bmtcioa filed September 14, 1917. Serial No. 191,394.

mission of air engine. and

Fig. 8 represents a fragmentary perspec- .tive view of the control for the air valve.

Referring to the drawings in detail, wherein similar reference numerals designate corresponding parts throughout the to the inlet manifold oli ithe,

several views, the numeral 10 indicates generally a well known type of explosive engine including the several cylinders 11 and crank case 12. The gaseous fuel produced in the carbureter 13 is conducted to the com bustion chambers of the engine by the inlet manifold 14, and the exhaust products of combustion are conducted from the cylii'r ders by the usual exhaust manifold 15. A hot air pipe 16 having communication with the air inlet port; of the carbureter 13 terminates in proximity to a portionpf theexhaust pipe 15, whereby the air entering" the pipe 16 is heated prior to its admission to the carbureter 13.

The upper horizontally disposed portion of the exhaust manifold 15 which extends along the side of the engine 10 is provided with an integral hollow boss 17 forming the air chamber 18, having at its front end a plurality of air inlet ports 19 formed in its outer wall. The air which is admitted to the chamber 18 through the ports 19 is effectively heated by contact with the heated Wall ofitheexhaust manifold 15 and is conducted to the inlet manifold 14 by a hot air pipe 19". Intermediate the chamber 18 and the manifold 14 a valve 20 is interposed in the pipe 19 for controlling the admission of heated air to the manifold. The stem 21 of the valve 20is extended rear- Wardly of the inlet manifold and is provided with a laterally projecting arm 22, pivotally connected with one end of a connectiug rod 23, having connection at its opposite end with a depending arm 24 carried by'the control rod 25. The lower, terminal of the controlling rod bearing member 26 suitably secured to the engine 10, and the upper terminal thereof is extended to a position within the convenient use of the driver of the vehicle for convenience in controlling the valve 20.

A horizontally disposed partition 27 is located in the rear portion of the chamber 18 and extends from the rear wall of the boss 17 to a point adjacent the hot air pipe 19. A relatively small port 28 is formed in the exhauet pipe or manifold 15 and connects the 25 is journaled in a exhaust chamber 29 with the chambel l8 at a point above the partition 27 for supplying a comparatively small quantity of the exhaust products of combustion to the chamber 18 to assist in rapidly heating the air ,prior to its admission 'to the earbureter and inlet manifold. It will be understood that the port 28 is of comparatively small diameter so as not to admit a quantity of theme haust products of combustion sufficient to pollute the fresh air.

An angular hot air pipe 30 communicates with the chamber 18 at a point below the partition 27 and is extended into a port 31 formed in the hot air pipe 16 for admitting an additional supply of heated air thereto.

What I claim is:

1. In an explosive engine, an exhaust manifold, a hollow boss formed integrah with the manifold providing a hot air chamber provided with air inlet ports adjacent one end, said exhaust pipe having a )ort therein communicating with the chamer adjacent its opposite end, and hot air pipes connected w th said chamber and the intake of the engine.

2. In an explosive engine, an exhaust manifold, a hollow boss formed integral \carbureter, ii manifold connerlin with the manifold providing a hot. air chamber having air inlet ports adjacent one end, said exhaust manifold having a relatively small port conununicating with the chamber adjacent its opposite end, a horizontally disposed partition arrangeddn the-ehambel beneath the port in the manifold, a hot air ipe communicating with the chamber be ow the partition, and a second hot air pipe coi'mnumcating with the chamber. intermediate its ends.-

3. In an explosive engine, a cylinder, a carbureter connected therewith, an air chamber in UOIIlll'llllllCiltlQll with the exhaust of the engine and means establishing communication between the chamber and cylinder on opposite sides of the carbureter.

4. In anexplosive engine, a cylinder, a

the carbureter with the cylinder, an air heating chamber in communication with the exhaust of the engine and conununicating wilh the inlet port of the earbureter, and means establishing communication between the chamber and the inlet manifold at a point between the carbureter and he engine.

In testimony whereof I ajiix my si nature.

FRANKLIN 1. H00 ER. 

